Peripherals/Bicycle Cassette

From OLPC

Rescued "Smart Drive" NZ made washing machine PM stepper motors have found immense use for microhydro & wind work, as ~ 200W can readily be obtained when used as a generator. Even a ~50W hand cranked unit has been developed by the Eco-Innovcation gurus, but as of course human fatigue sets in after ~ 10 minutes a pedaled exy-cycle version may be however much more ergonomic. The thought crossed my mind that rewound Smart Drives may have some mileage in the style of African water well pumping "Play Pumps" ? More details at these pix =>